package com.eluup.flume.sink.elasticsearch.client;

import java.util.Collection;
import java.util.Iterator;

/*
 * Copyright 2014 Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

public class RoundRobinList<T> {

	private Iterator<T> iterator;
	private final Collection<T> elements;

	public RoundRobinList(Collection<T> elements) {
		this.elements = elements;
		iterator = this.elements.iterator();
	}

	synchronized public T get() {
		if (iterator.hasNext()) {
			return iterator.next();
		} else {
			iterator = elements.iterator();
			return iterator.next();
		}
	}

	public int size() {
		return elements.size();
	}
}
